Answer:
A) ∠3 and ∠1
D) ∠2 and ∠4
Step-by-step explanation:
Following angle pairs can be classified as vertical angles.
A) ∠3 and ∠1
D) ∠2 and ∠4
If C=5n then the Y-intercept (C) is 5 times as much as the X and since 15/3 is 5 the answer is B
Answer:
The concentration of hydrogen ions in moles per liter (M) is 
Step-by-step explanation:
As we know
The hydrogen ion concentration of any solution at pH is given by

Substituting the given values in above equation, we get -
mol/l
The concentration of hydrogen ions in moles per liter (M) is 
I think the second answer is correct